If you're going to put plastic roof make sure and get gray. If you get clear it will be like a dang oven.

No solid roof. I really only want it for shade. It will have 2x8's standing up on 16" centers, and 2x4's laid flat also on 16's going the other way. Hopefully there will still be ok shade at noon but if it needs more then I may train some hops to grow up there.